In Canon, a horcrux is a fragment of a soul. But it stands to reason that this will not be the full answer in MoR, as it's a fairly serious violation of the author's beliefs
I would guess that the author sees conservation of energy as pretty important also. I would not be at all surprised if souls really exist in the HPMoR universe.
Va gur Nhgube'f Abgrf sbe Puncgref 39--40 (Cergraqvat gb Or Jvfr), Ryvrmre nccrnef gb or qryvorengryl inthr nf gb jurgure gur UCZBE havirefr unf na nsgreyvsr. Ng yrnfg, gung'f ubj V ernq guvf:
...Vg'f na vagrerfgvat dhrfgvba nf gb jurgure Uneel vf orunivat nf n Syng Rnegu Ngurvfg jvgu erfcrpg gb uvf fxrcgvpvfz nobhg na nsgreyvsr. Gb or engvbany, lbh jnag gb unir gur fbeg bs zvaq gung, vs vg svaqf vgfrys va n jbeyq jvgu ab nsgreyvsr, qbrfa'g oryvrir va na nsgreyvsr, naq vs vg svaqf vgfrys va n jbeyq jvgu na nsgreyvsr, qbrf oryvrir va na nsgreyvsr. W. X. Ebjy
The next discussion thread is here.
This is a new thread to discuss Eliezer Yudkowsky’s Harry Potter and the Methods of Rationality and anything related to it. This thread is intended for discussing chapter 85. The previous thread has long passed 500 comments. Comment in the 15th thread until you read chapter 85.
There is now a site dedicated to the story at hpmor.com, which is now the place to go to find the authors notes and all sorts of other goodies. AdeleneDawner has kept an archive of Author’s Notes. (This goes up to the notes for chapter 76, and is now not updating. The authors notes from chapter 77 onwards are on hpmor.com.)
The first 5 discussion threads are on the main page under the harry_potter tag. Threads 6 and on (including this one) are in the discussion section using its separate tag system. Also: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15.
As a reminder, it’s often useful to start your comment by indicating which chapter you are commenting on.
Spoiler Warning: this thread is full of spoilers. With few exceptions, spoilers for MOR and canon are fair game to post, without warning or rot13. More specifically: